Earth
- Climate
Hot summers, wild fires
Rising temperatures and earlier snowmelts in the western United States have intensified forest fires.
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- Environment
Pollution detective
A science fair project tackles contaminated drinking water and mosquito growth.
- Plants
Pumping up poison ivy
Boosting carbon dioxide levels makes poison ivy grow faster and become more toxic.
- Animals
Missing moose
By studying population patterns, scientists hope to figure out why moose in some areas are in trouble.
- Earth
A great quake coming?
The 100th anniversary of the great San Francisco earthquake is a reminder that future quakes could cause even more damage.
- Earth
Coral islands survive a tsunami
Tiny islands far out in the ocean can weather the giant waves of a tsunami.
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- Environment
Coral gardens
An expedition to an undersea mountain reveals large corals, brilliant sponges, and other strange sea creatures.
- Climate
Warmest year on record
Last year's worldwide average temperature was the highest ever recorded by scientists.
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- Environment
Out in the cold
With pollution, over-fishing, and shrinking habitats, the life of a penguin isn't getting any easier.
